1 /* 2 * Copyright (C) 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.car.audio.hal; 18 19 import android.media.AudioAttributes.AttributeUsage; 20 21 /** 22 * Framework focus listener interface to abstract away the specific HAL version 23 */ 24 public interface HalFocusListener { 25 /** 26 * Requests audio focus for the specified {@code usage}, {@code zoneId}, and {@code focusGain}. 27 * <p>The result will be communicated separately through 28 * {@link AudioControlWrapper#onAudioFocusChange}. 29 */ requestAudioFocus(@ttributeUsage int usage, int zoneId, int focusGain)30 void requestAudioFocus(@AttributeUsage int usage, int zoneId, int focusGain); 31 32 /** 33 * Abandons audio focus for the specified {@code usage} and {@code zoneId}. 34 * <p>The result will be communicated separately through 35 * {@link AudioControlWrapper#onAudioFocusChange}. 36 */ abandonAudioFocus(@ttributeUsage int usage, int zoneId)37 void abandonAudioFocus(@AttributeUsage int usage, int zoneId); 38 } 39